source3/smbd/password.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password and authentication handling
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 2007.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "system/passwd.h"
  23 #include "smbd/smbd.h"
  24 #include "smbd/globals.h"
  25 #include "../librpc/gen_ndr/netlogon.h"
  26 #include "auth.h"
  27 #include "../libcli/security/security.h"
  28
  29 /* Fix up prototypes for OSX 10.4, where they're missing */
  30 #ifndef HAVE_SETNETGRENT_PROTOTYPE
  31 extern int setnetgrent(const char* netgroup);
  32 #endif
  33 #ifndef HAVE_GETNETGRENT_PROTOTYPE
  34 extern int getnetgrent(char **host, char **user, char **domain);
  35 #endif
  36 #ifndef HAVE_ENDNETGRENT_PROTOTYPE
  37 extern void endnetgrent(void);
  38 #endif
  39
  40 enum server_allocated_state { SERVER_ALLOCATED_REQUIRED_YES,
  41                                 SERVER_ALLOCATED_REQUIRED_NO,
  42                                 SERVER_ALLOCATED_REQUIRED_ANY};
  43
  44 static user_struct *get_valid_user_struct_internal(
  45                         struct smbd_server_connection *sconn,
  46                         uint16 vuid,
  47                         enum server_allocated_state server_allocated)
  48 {
  49         user_struct *usp;
  50         int count=0;
  51
  52         if (vuid == UID_FIELD_INVALID)
  53                 return NULL;
  54
  55         usp=sconn->smb1.sessions.validated_users;
  56         for (;usp;usp=usp->next,count++) {
  57                 if (vuid == usp->vuid) {
  58                         switch (server_allocated) {
  59                                 case SERVER_ALLOCATED_REQUIRED_YES:
  60                                         if (usp->session_info == NULL) {
  61                                                 continue;
  62                                         }
  63                                         break;
  64                                 case SERVER_ALLOCATED_REQUIRED_NO:
  65                                         if (usp->session_info != NULL) {
  66                                                 continue;
  67                                         }
  68                                 case SERVER_ALLOCATED_REQUIRED_ANY:
  69                                         break;
  70                         }
  71                         if (count > 10) {
  72                                 DLIST_PROMOTE(sconn->smb1.sessions.validated_users,
  73                                               usp);
  74                         }
  75                         return usp;
  76                 }
  77         }
  78
  79         return NULL;
  80 }
  81
  82 /****************************************************************************
  83  Check if a uid has been validated, and return an pointer to the user_struct
  84  if it has. NULL if not. vuid is biased by an offset. This allows us to
  85  tell random client vuid's (normally zero) from valid vuids.
  86 ****************************************************************************/
  87
  88 user_struct *get_valid_user_struct(struct smbd_server_connection *sconn,
  89                                    uint16 vuid)
  90 {
  91         return get_valid_user_struct_internal(sconn, vuid,
  92                         SERVER_ALLOCATED_REQUIRED_YES);
  93 }
  94
  95 bool is_partial_auth_vuid(struct smbd_server_connection *sconn, uint16 vuid)
  96 {
  97         return (get_partial_auth_user_struct(sconn, vuid) != NULL);
  98 }
  99
 100 /****************************************************************************
 101  Get the user struct of a partial NTLMSSP login
 102 ****************************************************************************/
 103
 104 user_struct *get_partial_auth_user_struct(struct smbd_server_connection *sconn,
 105                                           uint16 vuid)
 106 {
 107         return get_valid_user_struct_internal(sconn, vuid,
 108                         SERVER_ALLOCATED_REQUIRED_NO);
 109 }
 110
 111 /****************************************************************************
 112  Invalidate a uid.
 113 ****************************************************************************/
 114
 115 void invalidate_vuid(struct smbd_server_connection *sconn, uint16 vuid)
 116 {
 117         user_struct *vuser = NULL;
 118
 119         vuser = get_valid_user_struct_internal(sconn, vuid,
 120                         SERVER_ALLOCATED_REQUIRED_ANY);
 121         if (vuser == NULL) {
 122                 return;
 123         }
 124
 125         session_yield(vuser);
 126
 127         if (vuser->auth_ntlmssp_state) {
 128                 TALLOC_FREE(vuser->auth_ntlmssp_state);
 129         }
 130
 131         DLIST_REMOVE(sconn->smb1.sessions.validated_users, vuser);
 132
 133         /* clear the vuid from the 'cache' on each connection, and
 134            from the vuid 'owner' of connections */
 135         conn_clear_vuid_caches(sconn, vuid);
 136
 137         TALLOC_FREE(vuser);
 138         sconn->smb1.sessions.num_validated_vuids--;
 139 }
 140
 141 /****************************************************************************
 142  Invalidate all vuid entries for this process.
 143 ****************************************************************************/
 144
 145 void invalidate_all_vuids(struct smbd_server_connection *sconn)
 146 {
 147         if (sconn->using_smb2) {
 148                 return;
 149         }
 150
 151         while (sconn->smb1.sessions.validated_users != NULL) {
 152                 invalidate_vuid(sconn,
 153                                 sconn->smb1.sessions.validated_users->vuid);
 154         }
 155 }
 156
 157 static void increment_next_vuid(uint16_t *vuid)
 158 {
 159         *vuid += 1;
 160
 161         /* Check for vuid wrap. */
 162         if (*vuid == UID_FIELD_INVALID) {
 163                 *vuid = VUID_OFFSET;
 164         }
 165 }
 166
 167 /****************************************************
 168  Create a new partial auth user struct.
 169 *****************************************************/
 170
 171 int register_initial_vuid(struct smbd_server_connection *sconn)
 172 {
 173         user_struct *vuser;
 174
 175         /* Paranoia check. */
 176         if(lp_security() == SEC_SHARE) {
 177                 smb_panic("register_initial_vuid: "
 178                         "Tried to register uid in security=share");
 179         }
 180
 181         /* Limit allowed vuids to 16bits - VUID_OFFSET. */
 182         if (sconn->smb1.sessions.num_validated_vuids >= 0xFFFF-VUID_OFFSET) {
 183                 return UID_FIELD_INVALID;
 184         }
 185
 186         if((vuser = talloc_zero(NULL, user_struct)) == NULL) {
 187                 DEBUG(0,("register_initial_vuid: "
 188                                 "Failed to talloc users struct!\n"));
 189                 return UID_FIELD_INVALID;
 190         }
 191
 192         /* Allocate a free vuid. Yes this is a linear search... */
 193         while( get_valid_user_struct_internal(sconn,
 194                         sconn->smb1.sessions.next_vuid,
 195                         SERVER_ALLOCATED_REQUIRED_ANY) != NULL ) {
 196                 increment_next_vuid(&sconn->smb1.sessions.next_vuid);
 197         }
 198
 199         DEBUG(10,("register_initial_vuid: allocated vuid = %u\n",
 200                 (unsigned int)sconn->smb1.sessions.next_vuid ));
 201
 202         vuser->vuid = sconn->smb1.sessions.next_vuid;
 203
 204         /*
 205          * This happens in an unfinished NTLMSSP session setup. We
 206          * need to allocate a vuid between the first and second calls
 207          * to NTLMSSP.
 208          */
 209         increment_next_vuid(&sconn->smb1.sessions.next_vuid);
 210         sconn->smb1.sessions.num_validated_vuids++;
 211
 212         DLIST_ADD(sconn->smb1.sessions.validated_users, vuser);
 213         return vuser->vuid;
 214 }
 215
 216 int register_homes_share(const char *username)
 217 {
 218         int result;
 219         struct passwd *pwd;
 220
 221         result = lp_servicenumber(username);
 222         if (result != -1) {
 223                 DEBUG(3, ("Using static (or previously created) service for "
 224                           "user '%s'; path = '%s'\n", username,
 225                           lp_pathname(result)));
 226                 return result;
 227         }
 228
 229         pwd = Get_Pwnam_alloc(talloc_tos(), username);
 230
 231         if ((pwd == NULL) || (pwd->pw_dir[0] == '\0')) {
 232                 DEBUG(3, ("No home directory defined for user '%s'\n",
 233                           username));
 234                 TALLOC_FREE(pwd);
 235                 return -1;
 236         }
 237
 238         DEBUG(3, ("Adding homes service for user '%s' using home directory: "
 239                   "'%s'\n", username, pwd->pw_dir));
 240
 241         result = add_home_service(username, username, pwd->pw_dir);
 242
 243         TALLOC_FREE(pwd);
 244         return result;
 245 }
 246
 247 /**
 248  *  register that a valid login has been performed, establish 'session'.
 249  *  @param session_info The token returned from the authentication process.
 250  *   (now 'owned' by register_existing_vuid)
 251  *
 252  *  @param session_key The User session key for the login session (now also
 253  *  'owned' by register_existing_vuid)
 254  *
 255  *  @param respose_blob The NT challenge-response, if available.  (May be
 256  *  freed after this call)
 257  *
 258  *  @param smb_name The untranslated name of the user
 259  *
 260  *  @return Newly allocated vuid, biased by an offset. (This allows us to
 261  *   tell random client vuid's (normally zero) from valid vuids.)
 262  *
 263  */
 264
 265 int register_existing_vuid(struct smbd_server_connection *sconn,
 266                         uint16 vuid,
 267                         struct auth_session_info *session_info,
 268                         DATA_BLOB response_blob)
 269 {
 270         user_struct *vuser;
 271         bool guest = security_session_user_level(session_info, NULL) < SECURITY_USER;
 272
 273         vuser = get_partial_auth_user_struct(sconn, vuid);
 274         if (!vuser) {
 275                 goto fail;
 276         }
 277
 278         /* Use this to keep tabs on all our info from the authentication */
 279         vuser->session_info = talloc_move(vuser, &session_info);
 280
 281         /* Make clear that we require the optional unix_token and unix_info in the source3 code */
 282         SMB_ASSERT(vuser->session_info->unix_token);
 283         SMB_ASSERT(vuser->session_info->unix_info);
 284
 285         DEBUG(10,("register_existing_vuid: (%u,%u) %s %s %s guest=%d\n",
 286                   (unsigned int)vuser->session_info->unix_token->uid,
 287                   (unsigned int)vuser->session_info->unix_token->gid,
 288                   vuser->session_info->unix_info->unix_name,
 289                   vuser->session_info->unix_info->sanitized_username,
 290                   vuser->session_info->info->domain_name,
 291                   guest));
 292
 293         DEBUG(3, ("register_existing_vuid: User name: %s\t"
 294                   "Real name: %s\n", vuser->session_info->unix_info->unix_name,
 295                   vuser->session_info->info->full_name));
 296
 297         if (!vuser->session_info->security_token) {
 298                 DEBUG(1, ("register_existing_vuid: session_info does not "
 299                         "contain a user_token - cannot continue\n"));
 300                 goto fail;
 301         }
 302
 303         /* Make clear that we require the optional unix_token in the source3 code */
 304         SMB_ASSERT(vuser->session_info->unix_token);
 305
 306         DEBUG(3,("register_existing_vuid: UNIX uid %d is UNIX user %s, "
 307                 "and will be vuid %u\n", (int)vuser->session_info->unix_token->uid,
 308                  vuser->session_info->unix_info->unix_name, vuser->vuid));
 309
 310         if (!session_claim(sconn, vuser)) {
 311                 DEBUG(1, ("register_existing_vuid: Failed to claim session "
 312                         "for vuid=%d\n",
 313                         vuser->vuid));
 314                 goto fail;
 315         }
 316
 317         /* Register a home dir service for this user if
 318         (a) This is not a guest connection,
 319         (b) we have a home directory defined
 320         (c) there s not an existing static share by that name
 321         If a share exists by this name (autoloaded or not) reuse it . */
 322
 323         vuser->homes_snum = -1;
 324
 325
 326         if (!guest) {
 327                 vuser->homes_snum = register_homes_share(
 328                         vuser->session_info->unix_info->unix_name);
 329         }
 330
 331         if (srv_is_signing_negotiated(sconn) &&
 332             !guest) {
 333                 /* Try and turn on server signing on the first non-guest
 334                  * sessionsetup. */
 335                 srv_set_signing(sconn,
 336                                 vuser->session_info->session_key,
 337                                 response_blob);
 338         }
 339
 340         /* fill in the current_user_info struct */
 341         set_current_user_info(
 342                 vuser->session_info->unix_info->sanitized_username,
 343                 vuser->session_info->unix_info->unix_name,
 344                 vuser->session_info->info->domain_name);
 345
 346         return vuser->vuid;
 347
 348   fail:
 349
 350         if (vuser) {
 351                 invalidate_vuid(sconn, vuid);
 352         }
 353         return UID_FIELD_INVALID;
 354 }
 355
 356 /****************************************************************************
 357  Add a name to the session users list.
 358 ****************************************************************************/
 359
 360 void add_session_user(struct smbd_server_connection *sconn,
 361                       const char *user)
 362 {
 363         struct passwd *pw;
 364         char *tmp;
 365
 366         pw = Get_Pwnam_alloc(talloc_tos(), user);
 367
 368         if (pw == NULL) {
 369                 return;
 370         }
 371
 372         if (sconn->smb1.sessions.session_userlist == NULL) {
 373                 sconn->smb1.sessions.session_userlist = SMB_STRDUP(pw->pw_name);
 374                 goto done;
 375         }
 376
 377         if (in_list(pw->pw_name,sconn->smb1.sessions.session_userlist,false)) {
 378                 goto done;
 379         }
 380
 381         if (strlen(sconn->smb1.sessions.session_userlist) > 128 * 1024) {
 382                 DEBUG(3,("add_session_user: session userlist already "
 383                          "too large.\n"));
 384                 goto done;
 385         }
 386
 387         if (asprintf(&tmp, "%s %s",
 388                      sconn->smb1.sessions.session_userlist, pw->pw_name) == -1) {
 389                 DEBUG(3, ("asprintf failed\n"));
 390                 goto done;
 391         }
 392
 393         SAFE_FREE(sconn->smb1.sessions.session_userlist);
 394         sconn->smb1.sessions.session_userlist = tmp;
 395  done:
 396         TALLOC_FREE(pw);
 397 }
 398
 399 /****************************************************************************
 400  In security=share mode we need to store the client workgroup, as that's
 401   what Vista uses for the NTLMv2 calculation.
 402 ****************************************************************************/
 403
 404 void add_session_workgroup(struct smbd_server_connection *sconn,
 405                            const char *workgroup)
 406 {
 407         if (sconn->smb1.sessions.session_workgroup) {
 408                 SAFE_FREE(sconn->smb1.sessions.session_workgroup);
 409         }
 410         sconn->smb1.sessions.session_workgroup = smb_xstrdup(workgroup);
 411 }
 412
 413 /****************************************************************************
 414  In security=share mode we need to return the client workgroup, as that's
 415   what Vista uses for the NTLMv2 calculation.
 416 ****************************************************************************/
 417
 418 const char *get_session_workgroup(struct smbd_server_connection *sconn)
 419 {
 420         return sconn->smb1.sessions.session_workgroup;
 421 }
 422
 423 /****************************************************************************
 424  Check if a username is valid.
 425 ****************************************************************************/
 426
 427 static bool user_ok(const char *user, int snum)
 428 {
 429         bool ret;
 430
 431         ret = True;
 432
 433         if (lp_invalid_users(snum)) {
 434                 char **invalid = str_list_copy(talloc_tos(),
 435                         lp_invalid_users(snum));
 436                 if (invalid &&
 437                     str_list_substitute(invalid, "%S", lp_servicename(snum))) {
 438
 439                         /* This is used in sec=share only, so no current user
 440                          * around to pass to str_list_sub_basic() */
 441
 442                         if ( invalid && str_list_sub_basic(invalid, "", "") ) {
 443                                 ret = !user_in_list(talloc_tos(), user,
 444                                                     (const char **)invalid);
 445                         }
 446                 }
 447                 TALLOC_FREE(invalid);
 448         }
 449
 450         if (ret && lp_valid_users(snum)) {
 451                 char **valid = str_list_copy(talloc_tos(),
 452                         lp_valid_users(snum));
 453                 if ( valid &&
 454                      str_list_substitute(valid, "%S", lp_servicename(snum)) ) {
 455
 456                         /* This is used in sec=share only, so no current user
 457                          * around to pass to str_list_sub_basic() */
 458
 459                         if ( valid && str_list_sub_basic(valid, "", "") ) {
 460                                 ret = user_in_list(talloc_tos(), user,
 461                                                    (const char **)valid);
 462                         }
 463                 }
 464                 TALLOC_FREE(valid);
 465         }
 466
 467         if (ret && lp_onlyuser(snum)) {
 468                 char **user_list = str_list_make_v3(
 469                         talloc_tos(), lp_username(snum), NULL);
 470                 if (user_list &&
 471                     str_list_substitute(user_list, "%S",
 472                                         lp_servicename(snum))) {
 473                         ret = user_in_list(talloc_tos(), user,
 474                                            (const char **)user_list);
 475                 }
 476                 TALLOC_FREE(user_list);
 477         }
 478
 479         return(ret);
 480 }
 481
 482 /****************************************************************************
 483  Validate a group username entry. Return the username or NULL.
 484 ****************************************************************************/
 485
 486 static char *validate_group(struct smbd_server_connection *sconn,
 487                             char *group, DATA_BLOB password,int snum)
 488 {
 489 #ifdef HAVE_NETGROUP
 490         {
 491                 char *host, *user, *domain;
 492                 struct auth_context *actx = sconn->smb1.negprot.auth_context;
 493                 bool enc = sconn->smb1.negprot.encrypted_passwords;
 494                 setnetgrent(group);
 495                 while (getnetgrent(&host, &user, &domain)) {
 496                         if (user) {
 497                                 if (user_ok(user, snum) &&
 498                                     password_ok(actx, enc,
 499                                                 get_session_workgroup(sconn),
 500                                                 user,
 501                                                 sconn->remote_address,
 502                                                 password)) {
 503                                         endnetgrent();
 504                                         return(user);
 505                                 }
 506                         }
 507                 }
 508                 endnetgrent();
 509         }
 510 #endif
 511
 512 #ifdef HAVE_GETGRENT
 513         {
 514                 struct group *gptr;
 515                 struct auth_context *actx = sconn->smb1.negprot.auth_context;
 516                 bool enc = sconn->smb1.negprot.encrypted_passwords;
 517
 518                 setgrent();
 519                 while ((gptr = (struct group *)getgrent())) {
 520                         if (strequal(gptr->gr_name,group))
 521                                 break;
 522                 }
 523
 524                 /*
 525                  * As user_ok can recurse doing a getgrent(), we must
 526                  * copy the member list onto the heap before
 527                  * use. Bug pointed out by leon@eatworms.swmed.edu.
 528                  */
 529
 530                 if (gptr) {
 531                         char *member_list = NULL;
 532                         size_t list_len = 0;
 533                         char *member;
 534                         int i;
 535
 536                         for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
 537                                 list_len += strlen(gptr->gr_mem[i])+1;
 538                         }
 539                         list_len++;
 540
 541                         member_list = (char *)SMB_MALLOC(list_len);
 542                         if (!member_list) {
 543                                 endgrent();
 544                                 return NULL;
 545                         }
 546
 547                         *member_list = '\0';
 548                         member = member_list;
 549
 550                         for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) {
 551                                 size_t member_len = strlen(gptr->gr_mem[i])+1;
 552
 553                                 DEBUG(10,("validate_group: = gr_mem = "
 554                                           "%s\n", gptr->gr_mem[i]));
 555
 556                                 strlcpy(member, gptr->gr_mem[i],
 557                                         list_len - (member-member_list));
 558                                 member += member_len;
 559                         }
 560
 561                         endgrent();
 562
 563                         member = member_list;
 564                         while (*member) {
 565                                 if (user_ok(member,snum) &&
 566                                     password_ok(actx, enc,
 567                                                 get_session_workgroup(sconn),
 568                                                 member,
 569                                                 sconn->remote_address,
 570                                                 password)) {
 571                                         char *name = talloc_strdup(talloc_tos(),
 572                                                                 member);
 573                                         SAFE_FREE(member_list);
 574                                         return name;
 575                                 }
 576
 577                                 DEBUG(10,("validate_group = member = %s\n",
 578                                           member));
 579
 580                                 member += strlen(member) + 1;
 581                         }
 582
 583                         SAFE_FREE(member_list);
 584                 } else {
 585                         endgrent();
 586                         return NULL;
 587                 }
 588         }
 589 #endif
 590         return(NULL);
 591 }
 592
 593 /****************************************************************************
 594  Check for authority to login to a service with a given username/password.
 595  Note this is *NOT* used when logging on using sessionsetup_and_X.
 596 ****************************************************************************/
 597
 598 bool authorise_login(struct smbd_server_connection *sconn,
 599                      int snum, fstring user, DATA_BLOB password,
 600                      bool *guest)
 601 {
 602         bool ok = False;
 603         struct auth_context *actx = sconn->smb1.negprot.auth_context;
 604         bool enc = sconn->smb1.negprot.encrypted_passwords;
 605
 606 #ifdef DEBUG_PASSWORD
 607         DEBUG(100,("authorise_login: checking authorisation on "
 608                    "user=%s pass=%s\n", user,password.data));
 609 #endif
 610
 611         *guest = False;
 612
 613         /* there are several possibilities:
 614                 1) login as the given user with given password
 615                 2) login as a previously registered username with the given
 616                    password
 617                 3) login as a session list username with the given password
 618                 4) login as a previously validated user/password pair
 619                 5) login as the "user =" user with given password
 620                 6) login as the "user =" user with no password
 621                    (guest connection)
 622                 7) login as guest user with no password
 623
 624                 if the service is guest_only then steps 1 to 5 are skipped
 625         */
 626
 627         /* now check the list of session users */
 628         if (!ok) {
 629                 char *auser;
 630                 char *user_list = NULL;
 631                 char *saveptr;
 632
 633                 if (sconn->smb1.sessions.session_userlist)
 634                         user_list = SMB_STRDUP(sconn->smb1.sessions.session_userlist);
 635                 else
 636                         user_list = SMB_STRDUP("");
 637
 638                 if (!user_list)
 639                         return(False);
 640
 641                 for (auser = strtok_r(user_list, LIST_SEP, &saveptr);
 642                      !ok && auser;
 643                      auser = strtok_r(NULL, LIST_SEP, &saveptr)) {
 644                         fstring user2;
 645                         fstrcpy(user2,auser);
 646                         if (!user_ok(user2,snum))
 647                                 continue;
 648
 649                         if (password_ok(actx, enc,
 650                                         get_session_workgroup(sconn),
 651                                         user2,
 652                                         sconn->remote_address,
 653                                         password)) {
 654                                 ok = True;
 655                                 strlcpy(user,user2,sizeof(fstring));
 656                                 DEBUG(3,("authorise_login: ACCEPTED: session "
 657                                          "list username (%s) and given "
 658                                          "password ok\n", user));
 659                         }
 660                 }
 661
 662                 SAFE_FREE(user_list);
 663         }
 664
 665         /* check the user= fields and the given password */
 666         if (!ok && lp_username(snum)) {
 667                 TALLOC_CTX *ctx = talloc_tos();
 668                 char *auser;
 669                 char *user_list = talloc_strdup(ctx, lp_username(snum));
 670                 char *saveptr;
 671
 672                 if (!user_list) {
 673                         goto check_guest;
 674                 }
 675
 676                 user_list = talloc_string_sub(ctx,
 677                                 user_list,
 678                                 "%S",
 679                                 lp_servicename(snum));
 680
 681                 if (!user_list) {
 682                         goto check_guest;
 683                 }
 684
 685                 for (auser = strtok_r(user_list, LIST_SEP, &saveptr);
 686                      auser && !ok;
 687                      auser = strtok_r(NULL, LIST_SEP, &saveptr)) {
 688                         if (*auser == '@') {
 689                                 auser = validate_group(sconn,auser+1,
 690                                                        password,snum);
 691                                 if (auser) {
 692                                         ok = True;
 693                                         fstrcpy(user,auser);
 694                                         DEBUG(3,("authorise_login: ACCEPTED: "
 695                                                  "group username and given "
 696                                                  "password ok (%s)\n", user));
 697                                 }
 698                         } else {
 699                                 fstring user2;
 700                                 fstrcpy(user2,auser);
 701                                 if (user_ok(user2,snum) &&
 702                                     password_ok(actx, enc,
 703                                                 get_session_workgroup(sconn),
 704                                                 user2,
 705                                                 sconn->remote_address,
 706                                                 password)) {
 707                                         ok = True;
 708                                         strlcpy(user,user2,sizeof(fstring));
 709                                         DEBUG(3,("authorise_login: ACCEPTED: "
 710                                                  "user list username and "
 711                                                  "given password ok (%s)\n",
 712                                                  user));
 713                                 }
 714                         }
 715                 }
 716         }
 717
 718   check_guest:
 719
 720         /* check for a normal guest connection */
 721         if (!ok && GUEST_OK(snum)) {
 722                 struct passwd *guest_pw;
 723                 fstring guestname;
 724                 fstrcpy(guestname,lp_guestaccount());
 725                 guest_pw = Get_Pwnam_alloc(talloc_tos(), guestname);
 726                 if (guest_pw != NULL) {
 727                         strlcpy(user,guestname,sizeof(fstring));
 728                         ok = True;
 729                         DEBUG(3,("authorise_login: ACCEPTED: guest account "
 730                                  "and guest ok (%s)\n", user));
 731                 } else {
 732                         DEBUG(0,("authorise_login: Invalid guest account "
 733                                  "%s??\n",guestname));
 734                 }
 735                 TALLOC_FREE(guest_pw);
 736                 *guest = True;
 737         }
 738
 739         if (ok && !user_ok(user, snum)) {
 740                 DEBUG(0,("authorise_login: rejected invalid user %s\n",user));
 741                 ok = False;
 742         }
 743
 744         return(ok);
 745 }